Push and pull friction type



Nov. 24, 1953 H. N. MAGIDA Re. 23,744

PUSH AND PULL FRICTION TYPE EXERCISER 2 Sheets-Sheet l Original Filed March 27, 1948 In van/for HerberA/I/dlgida BYE/M iv.

NOV. 24, 1953 MAGlDA Re. 23,744

PUSH AND PULL FRICTION TYPE EXERCISER Original Filed March 27, 1948 v 2 Sheets-Sheet 2 I. l4 l5 3 5a l7 50 12 ll Her erLMMa' ida "5 YEML LU. Mil-41ml Reissued Nov. 24, 1953 PUSH AND PULL FRICTION TYPE EXERCISER Herbert N. Magida, Chicago, 111.

Original No. 2,543,729, dated February 27, 1951, Serial No. 17,567, March 27, 1948. Application for reissue February 5, 1953, Serial No. 335,408

Matter enclosed in heavy brackets appears in the original patent but forms no part of this reissue specification; matter printed in italics indicates the additions made by reissue.

.12 Claims.

This invention relates to an exercising device for use in gymnasiums, or homes or the lik and concerns itself with a structure comprising a pair of arms pivoted together at one end by means of friction disks which can be adjusted to vary the resisting friction and in which the device is free to be swung as desired.

In the past attempts have been made to use springs for the resistance in such devices but it was diflicult to properly regulate the tension of the springs which would tend to lose their tension during use. Further, the tension of a particular spring would not be likely to meet the needs of different individuals. Attempts have also been made to use friction slide bars in such devices but they provided only a limited range of benefit, In instances where friction arms have been anchored to stationary structures, there has been also an undue limitation upon the range of beneficial eifect arising from the limited range of exercise that such a device affords.

It is an object of this invention to provide an exercising device which will overcome the short comings of prior devices as above pointed out; a device which is free to be moved in any direction when in use to provide a larger range of beneficial effect and in which the frictional resistance can be easily varied without the use of tools to meet the strength or requirements of any individual.

It is also an object of this invention to provide such an exercising device in which the friction adjusting means can be securely locked in adjusted postion so that there is no liability of the same working loose during use.

With these and other objects'in view which n will become apparentas the description proceeds, this invention comprises the novel structure and combination of parts hereinafter described and more particularly pointed out and defined in the appended claims.

In the accompanying drawing which illustrates a preferred'form .of this invention and .in which similar reference numerals refer to similar features in the different views:

Fig. ,1 is a perspective view of an exercising device involving this invention in the hands of a user illustrating the manner .in which it can be used,

Fig. 2 isa fragmentary and enlarged eleva-tional View of the friction joint,

.li'ig. 3 is .an enlarged edge elevational view .of

Fig. 5'is a perspective View of the friction joint in disassembled relation.

In referring now to the drawing, it will be observed that the illustrated embodiment of this invention comprises two arms I and 8 connected by a friction joint. The arm I terminates at its outer end in a friction disk 1a which is flat and extends at substantially right angles to the arm. The arm 8 likewise terminates in a fiat friction disk 8a at its outer end which extends at substantially right angles to the arm proper.

In the illustrated embodiment of the invention, the arms are not shown as integral structures. Each consists of two parts; the handle parts being hollow and enlarged and in telescopic relation with shanks on the disks. Thus the handle portion lb of the arm I is enlarged and telescoped at its lower portion over a shank 10 on the disk 1a. The arm 8 is likewise enlarged at its lower end and telescoped over a flat shank on the disk 8a. The flat sides of the shanks 7c and 8c are preferably reinforced by strengthening ribs 9. The handle portions of the arms may be attached to the shanks by rivets ID or in any other suitable manner.

An internally threaded hub I l is secured to the center of the disk 8a in any suitable manner. A friction disk I2 is positioned between the disks Ta and 8a. A smaller friction disk I3 is posi tioned adjacent the outer surface of the disk 1a and adisk l4 having an enlarged knurled rim portion I5 is positioned against the friction disk 13. The disk [4 is provided with a central .threaded aperture l6. Thehub II has a threaded aperture Ha and the disk 8a has a threaded aperture H. The disk 1a and the adjacent friction disks have smooth apertures I8 which are slightly larger than the threaded apertures in the other disks.

The disks -1a, 8a, [2, l3 and Mare held in tight engagement :byascrew 19 having a head .20 with right angled notches 2! in spaced relation for receiving a locking pawl 22 which is pivoted to the outersurface of the disk I 4. A leaf spring 24 (Fig. .2) is attached to the under surface of the pawl and the free end thereof is confined under a stud 25 on the disk M. This spring tends to hold the pawl in engagement with the head of the screw bolt l9. But to insure locking the pawl 22 in engagement with the head of the screw bolt, a locking cam 26 is pivoted to the disk [4 as indicated at 21 adjacent the forward end of the pawl when the same is in its locking position. In Fig. 2, the cam is shown in pawl locking position. By

swin ing the cam on its pivot it can be moved to unlocking position as is obvious.

The screw bolt I9 s in threaded relation with the disk M. the disk 8a and the hub H. A pm 28 extends thru the hub and screw bolt l9 and normally prevents relative rot tion between the screw bolt and the hub II with its attached disk 8a. Thus it will be a parent that the screw bolt I9 is locked to the disk 8a and the disk I4 with the result that the arm 8 with its disk 8a and disk I4 will rotate as a unit.

The friction joint is adapted to be adjusted to increase or decrease the frictional resistance by rotating the disk I4 which is provided with a hand knob 29 forsuch a purpose. However, before an adjustment can be made. it is necessary to unlock the said disk M from the head of the bolt bv disen aging the pawl 22. After the adjustment has been made, the pawl will again be moved to locking position and engagedby the a lock ng cam 26.

In use, the user seizes the ends of the h ndles 1 and 8 which may be provided with suitable hand knobs 30 for such a purpose. The handles are adapted to be oscillated.

In exercising, the arms may be spread apart as far as desired and brought together against the resistance of the friction disks; at the same t me the device may be raised or lowered as a whole or swung in various directions to bring a wide range of muscles into action. If the friction should be too great or not sufficient, the user can ouickly remedy this himself without the use of tools by merely unlocking the pawl and rotating the disk I4 in the proper direction; then moving the pawl aga n to locking position as previously set forth.

It will be appreciated that the exercising device involving this invention can be used by a class in a gymnasium or in the home or in most any place and that it can be used to provide a wide range of beneficial effect due to the fact that it can be freely moved or swung when in use.

I am aware that many changes may be made and various details of construction may be modified without departing from the principles of this invention so I do not propose limiting the patent granted thereon otherwise than necessitated by the appended claims.

I claim:

[1. In an exercising device, a pair of arms having disks at one end, a friction disk between said disks, a second friction disk positioned against the outer surface of one of said first mentioned disks, a rotatable adjustable disk positioned against said second friction disk, a screw bolt connecting said disks and having threaded relation with said rotatable disk, means for fixedly anchoring said screw bolt to the outer of said first mentioned disks and means for releasably locking said bolt to said rotatable disk for normally preventing relative rotation thereof] 2. In an exercising device of the class described, a pair of arms hav ng fiat disks at one end, said disks [extending] being oflset inwardly substantially at right angles to the axis of said arms and in spaced relation, a friction disk between said pair of disks, a second friction disk positioned against the outer face of one of said first mentioned disks, a rotatable and adjustable disk positioned against said second friction disk, a screw bolt connecting all of said disks and having threaded relation w th said rotatable disk about an axis ofiset inwardly from said arms, means for fixedly securing said bolt to the outer disk of said pair for preventing relative rotation '4 thereof and means for releasably locking said bolt to said rotatable disk for causing conjoint rotation thereof.

[3. In an exercising device of the class described, a pair of arms having disks at one end in spaced relation, a friction disk between said disks, a second friction disk positioned against the outer face of one of said pair of first mentioned disks, a rotatable disk positioned against said second friction disk, a screw bolt connecting all of said disks and having threaded relation with said rotatable disks, coacting means on said bolt and rotatable disk for releasably locking the same together and means for fixing said bolt to a first mentioned disk] 4. In an exercising device of the class described, a pair of arms having disks at one end [extending] ofisct inwardly at substantially [at] right angles to the axis of said arms and in slightly spaced relation, a friction disk between said disks, a second friction disk adjacent the outer face of one of said first mentioned disks, a rotatably adjustable disk adjacent the outer face of said second friction disk, a screw bolt having an axis ojjset inwardly of said arms and having a notched head connecting all of said disks with the notched head positioned against the outer face of said rotatable member, a pawl pivoted on said rotatably adjustable disk for engaging said notches for locking said bolt to said disk, means for locking said pawl in looking position and means for fixedly connecting the tail end of said bolt to the outside disk of those first mentioned to cause such disk, bolt and adjustable disk to move as a unit.

5. In an exercising device of the class described, a pair of arms pivotally connected at one end by a friction joint free to move in any direction, each arm having a disk at one end [extending] offset inwardly at right angles thereto with a friction disk between said disks, a second friction disk adjacent the outer face of one of said first mentioned disks, an adjustable disk adjacent the outer face of said second disk, means for connecting all of said disks comprising a member releasably connected to said adjustable disk and fixedly connected to the outer disk of the first mentioned disks, said means having a threaded relation with said adjustable disk.

6. In an exercising device, a pair of relatively movable arms having disks at adjacent ends, a flat friction disk between said disks, a second fiat friction disk adjacent the outer face of one of said first mentioned disks, a rotatable and adjustable disk positioned against the outer surface of said second frictional disk, a screw bolt extending thru said disks and having a threaded relation with said rotatable disk, said bolt having a [notched] head with circamjerentially spaced notches adjacent the the outer face of said rotatable disk, a latch on the outer face of said rotatable disk for locking engagement with the notches of said notched head whereby the pressure between said disks may be adjusted in definite predetermined incremental amounts, and means for anchoring the unheaded end of said bolt to the outside disk of the pair of first mentioned disks.

7. In an exercising device, a pair of relatively movable exercising arms having disks at adjacent ends, a flat friction disk between said disks and in frictional contact therewith, a second fiat frictional disk in contact with the outer face of one of said first mentioned disks, a rotatable hand operated disk positioned against the outer surface of said second mentioned frictiona1-disk,

"a bolt extending thru all-of said-disks andhavin a threaded relation with said hand operateddisk,

said bolt having a [notched] head with circumferentially spaced notches adjacent the outer i surface of said hand operateddisk, a latch upon the outer face of said hand operated .disk 'for locking engagement with the notches of said notched head whereby the pressure between said disks may be adjusted in definite predetermined incremental amounts, a cam upon the outer face of said hand operated disk for looking said latch in operative position and means for anchoring the unheaded end of said bolt to the outside disk of the pair of first mentioned disks.

8. An exercising device having a pair of elongated operating arms adapted to be respectively grasped for operation by the hands of an operator and having respective disks rigidly secured at one end thereof, a friction disk between said arm disks for frictionally engaging said arm disks, a pivot pin extending through said arm and friction disks and means for varying the pressure between said disks to vary the force required to move said arms relative to one another about said pivot pin, said entire device being sufficiently light in weight to be freely movable by hand in any direction as a unit when in use, said elongated opcrating arms being many times longer than the diameter of said disks whereby the ends of said arms opposite the ends carrying said disks may be moved relative to one another along an arc of appreciable radius having its center coextensive with the longitudinal axis of said pivot pin, and said operating arms being restrained by said pivot pin from relative movement about axes other than said axis.

9. A free-swinging exercising device comprising a pair of elongated operating arms adapted to be respectively grasped for operation by the hands of an operator and having disks rigidly secured at one end, a friction disk between said disks, a pivot bolt extending through said disks, said elongated operating arms being many times longer than the diameter of said disks whereby the ends of said arms opposite the ends carrying said disks may be moved relative to one another along an arc of appreciable radius having its center coextensive with the longitudinal axis of said pivot bolt, said operating arms being restrained by said pivot bolt from relative movement about axes other than said axis, an adjustable nut upon said bolt for varying the friction between said disks and means for preventing loosening of said nut by movement of one arm relative to the other arm, said entire device being sufficiently light in weight to be freely movable as a unit by hand in any direction when in use.

10. A free-swinging exercising device comprising a pair of arms adapted to be respectively grasped for operation by the hands of an operator and having respective disks at one end offset inwardly laterally from said arms, a friction disk between said latter disks, apertures in said disks offset inwardly from said arms, a pin passing through the apertures in all of said disks about which said arms and attached disks may pivot and means for compressing all of said disks together whereby an appreciable amount of force is necessary to separate said arms.

11. In an exercising device, a pair of elongated operating arms having disks rigidly secured at one end, a friction disk between said disks, a rotatable adjustable disk overlying the outer face of one of said arm disks, a screwbolt connecting disks and in threaded relation with said rotatable adjustable disk, said elongated operating ams being'many times longer than the diameter of said disks whereby the ends of said arms opposite the ends carrying .said disks may be moved relative to one-another along an arc of appreciable radius having its center coextensive with the longitudinal axis of said screw bolt, said operating arms being restrained by said screwbolt from relative movement about axes other than said axis, and means for fixedly anchoring said screw bolt to one of said arm disks for preventing relative rotation therebetween.

12. In an exercising device of the class described, a pair of elongated operating arms pivotally connected at one end by a friction joint, each arm having a disk rigidly secured at one end with a friction disk between said disks, an adjustable disk overlying the outer face of one of said arm disks, a pivot pin extending through all of said disks having a threaded portion, said elongated operating arms being many times longer than the diameter of said disks whereby the ends of said arms opposite the ends carrying said disks may be moved relative to one another along an arc of appreciable radius having its center coextensive with the longitudinal axis of said pin, said operating arms being restrained by said pivot pin from relative movement about axes other than said axis, said adjustable disk threaded tosaid threaded portion of said pivot pin for providing a means for adjusting the pressure between said disks to vary the force required to separate said arms, said entire device being sufficiently light in weight to be freely movable as a unit by hand in any direction when in use.

13. In an exercising device, a pair of exercising arms having disks at adjacent ends, a flat friction disk between said disks for making frictional contact therewith, a rotatable hand operated disk overlying the outer face of one of said arm disks, a bolt extending through all of said disks and being in threaded relation with said hand operated disk, said bolt having a head with circumferentially spaced notches and positioned on the outer surface of said hand operated disk, a latch upon the outer face of said hand operated disk for making locking engagement with the notches of said notched head whereby the pressure between said disks may be adjusted in definite predetermined incremental amounts, and means for anchoring the unheaded end of said bolt to said other arm disk.

14. An exercising device having a pair of elongated operating arms which are enlarged at one end to provide confronting friction making surfaces of appreciable area which are integral with said operating arms, means pivotally supporting said arms for relative rotation with respect to each other about an axis extending laterally through said enlarged arm ends thereof, said arms being restrained by said means from relative rotation about other axes, said elongated operating arms being many times longer than the outer dimension of said enlarged arm ends whereby the ends of said arms opposite said enlarged ends may be moved relative to one another along an arc of appreciable radius, adjustable means for compressing said enlarged ends toward one another to vary the force required to pivot said arms relative to each other, said entire device being sufiiciently light in weight to be freely 7 movable as a unit by hand in any direction when Number in use. 2,252,868 HERBERT N. MAGIDA. 2,470,215 2,529,347 References Cited in the file of this patent 5 a or the original patent Number UNITED STATES PATENTS 577,971

Number Name Date Martin Sept. 10, 1929 m Name Date Senn Aug. 19, 1941 Graham May 17, 1949 Mahler et a1 Nov. 7, 1950 FOREIGN PATENTS Country Date France Sept. 13, 1924 

